Selection Of Soft Starter Size; Current Ratings (Iec Ratings) - Danfoss VLT MCD 600 Operating Manual

Operating Guide | VLT® Soft Starter MCD 600

3.3 Selection of Soft Starter Size

The size of the soft starter must match the motor and the application.
Select a soft starter that has a current rating at least equal to the motor's full load current rating (see motor nameplate) at the start
duty.
The soft starter's current rating determines the maximum motor size it can be used with. The soft starter's rating depends on the
number of starts per hour, the length and current level of the start, and the amount of time the soft starter is off (not passing current)
between starts.
The soft starter's current rating is only valid when used in the conditions specified in the AC53b code. The soft starter may have a
higher or lower current rating in different operating conditions.

3.4 Current Ratings (IEC Ratings)

Contact the local supplier for ratings under operating conditions not covered by these rating charts.
Illustration 2: AC53b Format
All ratings are calculated at an altitude of 1000 m (3280 ft) and an ambient temperature of 40 °C (104 °F).
Table 2: In-line Installation, MCD6-0020B ~ MCD6-0042B
3.0-10:350
MCD6-0020B 24
MCD6-0034B 42
MCD6-0042B 52
Table 3: In-line Installation, MCD6-0063B ~ MCD6-0579B
3.0-10:590
MCD6-0063B 64
MCD6-0069B 69
MCD6-0086B 105
14 | Danfoss A/S © 2018.10
N O T I C E
N O T I C E
3.5-15:345 4.0-10:350
20 19
34 34
42 39
3.5-15:585 4.0-10:590
63 60
69 69
86 84
System Design
4.0-20:340 5.0-5:355
16 17
27 32
35 34
4.0-20:580 5.0-5:595
51 54
62 65
69 77
AQ262141844215en-000202 / 175R1174